diff --git a/plugins/modules/gcp_sql_database.py b/plugins/modules/gcp_sql_database.py
index f1d5512..459c4a9 100644
--- a/plugins/modules/gcp_sql_database.py
+++ b/plugins/modules/gcp_sql_database.py
@@ -50,12 +50,18 @@ options:
     type: str
   charset:
     description:
-    - The MySQL charset value.
+    - The charset value. See MySQL's [Supported Character Sets and Collations](U(https://dev.mysql.com/doc/refman/5.7/en/charset-charsets.html))
+      and Postgres' [Character Set Support](U(https://www.postgresql.org/docs/9.6/static/multibyte.html))
+      for more details and supported values. Postgres databases only support a value
+      of `UTF8` at creation time.
     required: false
     type: str
   collation:
     description:
-    - The MySQL collation value.
+    - The collation value. See MySQL's [Supported Character Sets and Collations](U(https://dev.mysql.com/doc/refman/5.7/en/charset-charsets.html))
+      and Postgres' [Collation Support](U(https://www.postgresql.org/docs/9.6/static/collation.html))
+      for more details and supported values. Postgres databases only support a value
+      of `en_US.UTF8` at creation time.
     required: false
     type: str
   name:
@@ -103,12 +109,18 @@ EXAMPLES = '''
 RETURN = '''
 charset:
   description:
-  - The MySQL charset value.
+  - The charset value. See MySQL's [Supported Character Sets and Collations](U(https://dev.mysql.com/doc/refman/5.7/en/charset-charsets.html))
+    and Postgres' [Character Set Support](U(https://www.postgresql.org/docs/9.6/static/multibyte.html))
+    for more details and supported values. Postgres databases only support a value
+    of `UTF8` at creation time.
   returned: success
   type: str
 collation:
   description:
-  - The MySQL collation value.
+  - The collation value. See MySQL's [Supported Character Sets and Collations](U(https://dev.mysql.com/doc/refman/5.7/en/charset-charsets.html))
+    and Postgres' [Collation Support](U(https://www.postgresql.org/docs/9.6/static/collation.html))
+    for more details and supported values. Postgres databases only support a value
+    of `en_US.UTF8` at creation time.
   returned: success
   type: str
 name:
diff --git a/plugins/modules/gcp_sql_database_info.py b/plugins/modules/gcp_sql_database_info.py
index c60f1e3..03625ea 100644
--- a/plugins/modules/gcp_sql_database_info.py
+++ b/plugins/modules/gcp_sql_database_info.py
@@ -67,12 +67,18 @@ resources:
   contains:
     charset:
       description:
-      - The MySQL charset value.
+      - The charset value. See MySQL's [Supported Character Sets and Collations](U(https://dev.mysql.com/doc/refman/5.7/en/charset-charsets.html))
+        and Postgres' [Character Set Support](U(https://www.postgresql.org/docs/9.6/static/multibyte.html))
+        for more details and supported values. Postgres databases only support a value
+        of `UTF8` at creation time.
       returned: success
       type: str
     collation:
       description:
-      - The MySQL collation value.
+      - The collation value. See MySQL's [Supported Character Sets and Collations](U(https://dev.mysql.com/doc/refman/5.7/en/charset-charsets.html))
+        and Postgres' [Collation Support](U(https://www.postgresql.org/docs/9.6/static/collation.html))
+        for more details and supported values. Postgres databases only support a value
+        of `en_US.UTF8` at creation time.
       returned: success
       type: str
     name: